

class Error(Exception):
	pass

class ArgumentError(Error):
	pass
class InsufficientArgumentsError(Error):
	pass
class InvalidOperationError(Error):
	pass
class NotImplementedError(Error):
	pass
class UnknownPropertyError(Error):
	pass

class InvalidRestrictorError(Error):
	pass
class MissingActionError(Error):
	pass
class MissingModelError(Error):
	pass
class ModelError(Error):
	pass
class RequestedAttributeError(Error, AttributeError):
	pass
class SavingInvalidFormError(Error):
	pass
class TemplateNameError(Error):
	pass
